Comment Well... (Score 1) 700
Lots of them. Here are a few pulled from my Goodreads list, in no particular order
His Dark Materials Trilogy by Philip Pullman - these are kids books, but when I reread them recently I realized that they had a profound effect on my adolescent mind.
Neal Stephenson - his science fiction gave me a taste of what the world could be.
Born to Run by Christopher McDougall - It's kind of silly, but a few years ago this book planted the seeds that got me running -- and not just running but running almost daily and LOVING it. Now I'm coming up on thirty with my fitness level tracking upwards. It's amazing.
Deep Economy by Bill McKibben